Gamezop brings to you one of the most popular brain games - Sudoku! fill a 9×9 grid with numbers so that each row, column and 3×3 section contain all of the digits between 1 and 9. Sudoku, Sudoku Classic, puzzle, brain game, number puzzles, logic puzzles, Gamezop, 9x9, numbers 1-9, cognitive abilities, concentration, challenge, relaxation, online Sudoku, free Sudoku, number game